Fix signal callback - use lambda to ignore index parameter
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@@ -98,7 +98,7 @@ func _ready() -> void:
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arrival_list = ItemList.new()
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arrival_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
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arrival_list.item_selected.connect(_validate_selection)
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arrival_list.item_selected.connect(func(idx): _validate_selection())
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right_vbox.add_child(arrival_list)
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# Status label
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